<!DOCTYPE html>
<html lang="en">

<head>
    <title></title>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
</head>
<style>
    .spinner {
        width: 60px;
        height: 60px;

        position: relative;
        margin: 100px auto;
    }

    .double-bounce1,
    .double-bounce2 {
        width: 100%;
        height: 100%;
        border-radius: 50%;
        background-color: #67CF22;
        opacity: 0.6;
        position: absolute;
        top: 0;
        left: 0;
        -webkit-animation: bounce 2.0s infinite ease-in-out;
        animation: bounce 2.0s infinite ease-in-out;
    }

    .double-bounce2 {
        -webkit-animation-delay: -1.0s;
        animation-delay: -1.0s;
    }

    @-webkit-keyframes bounce {
        0%,
        100% {
            -webkit-transform: scale(0.0)
        }
        50% {
            -webkit-transform: scale(1.0)
        }
    }

    @keyframes bounce {
        0%,
        100% {
            transform: scale(0.0);
            -webkit-transform: scale(0.0);
        }
        50% {
            transform: scale(1.0);
            -webkit-transform: scale(1.0);
        }
    }
</style>

<body>
    <div class="spinner">
        <div class="double-bounce1"></div>
        <div class="double-bounce2"></div>
    </div>
</body>
<script src="./test.js"></script>
<script>
    this.test(2)
</script>
</html>